The former Transformers actress told America's Cosmopolitan magazine that she doesn't have a big social circle but doesn't feel as if she needs one.

She said: "I consider myself a 'girl's girl' in that I'm not competitive, jealous or catty.

"But I don't have a ton of female friends - I have one. Her name is Mindy and she's a facialist."

Megan, who is married to actor Brian Austin Green, went on: "I don't have many guy friends, either.

"I've never been a social butterfly. I don't feel lonely or isolated. I have one really great friend and that's all I need."

The Teenage Mutant Ninja Turtles actress, who has two young sons with her hubby, also told how she keeps male colleagues on their toes if they try and flirt with her.

"When I'm working, I refuse to flirt," said the 28-year-old. "If someone tries, it becomes an endless roast. I'll say, 'Nice beard, buddy' or 'You look fancy!' I know he's spent an hour doing that specific thing to his hair, and the minute I point it out, his game is shattered.

"I like to have men off their guard. Then you are in charge. You don't ever have to feel like men have power over you."

And Megan advised women to take charge of their sexuality.

"Women don't have to be desperate and try so hard. Allow yourself to be strong and powerful and men will be crawling on their hands and knees," she said.